From: U.S. Congress Joint Committee on Pearl Harbor Attack Hearings; Pt. 
35, the Clausen Investigation, pp. 52-62.

                              Exhibit "A"

[114]                  UNITED STATES PACIFIC FLEET
                     U. S. S. PENNSYLVANIA, Flagship
Cincpac File No.                                                     HRK
Serial 01954
                                                 PEARL HARBOR,
                                               November 27, 1941.


From: Commander-in-Chief, United States Pacific Fleet.
Subject: Pacific Fleet Intelligence Bulletin No. 45-41.
Enclosure: (A) Subject Bulletin.

1. Enclosure (A) is forwarded herewith for information.


Page 53

3. This information obtained from Naval Intelligence sources has been 
reproduced by the Commander-in-Chief, United States Pacific Fleet. Any 
request for additional copies of this document will be made to the 
Commander-in-Chief and not to the Division of Naval Intelligence

4. Additional copies shall not be made. This bulletin should be retained 
for study and reference (plus subsequent additions or corrections) 
during the present National Emergency.

                                                      P. C. Crosley
                                                      P. C. CROSLEY,
                                                         By direction.
   List I, Case 3; P., X.
   Atlantic Fleet A1;
   Asiatic Fleet A1;
   One copy each to: 
      FATU, NTS, NC4, ND11-ND14
      NB49, Rdo. & Snd. Lab.

                              Exhibit "B"

[115]                         TOP SECRET

                   INTELLIGENCE BULLETIN NO. 45-41


(A) ORGANIZATION OF THE JAPANESE FLEETS ....... Pages 1 to 12 inclusive.
    Major Fleet Commands ............................. Page 1.
    Combined Fleet and First Fleet ...................  "   2.
    Combined Fleet and Second Fleet ..................  "   3.
    Third Fleet ......................................  "   4.
    Fourth Fleet .....................................  "   5 and 6.
    Fifth Fleet ......................................  "   7. 
    Sixth Fleet-(Submarine Fleet).....................  "   7.
    Carrier Fleet ....................................  "   8.
    Combined Air Force ...............................  "   9.
    Train for Combined Fleet .........................  "   10.
    Japanese Naval Forces in China ...................  "   11 and 12.
       13 and 14.
    General Situation.
    Air Distribution.
    Table "A" showing distribution of material and personnel forces 
       in Mandates
       (2 pages to be pasted together)
    Sketch of PALAO (PELEW).
    Sketch of MALAKAL Harbor, etc.
    Sketch of JALUIT Harbor, etc.

[116]                             TOP SECRET

(A)          ORGANIZATION OF THE JAPANESE FLEETS. October 30, 1941.

The following revision of Op-16-F-2, O.N.I. Serial #27-41 supersedes and
replaces the former report on this subject.

The principal change consists of a further increase in the number of 
fleet commands. This has arisen from the regrouping of aircraft carriers 
and seaplane tenders into separate forces, and from the creation of 
special task forces in connection with the southward advance into Indo-
China. The regrouping has resulted in a notable specialization within 
the various commands, as shown below.

Page 54

                    MAJOR FLEET COMMANDS
I. Combined Fleet
   1 First Fleet      (Battle Force)           3 Batdivs, 1 Crudiv, 
                                                 2 Desrons
   2 Second Fleet     (Scouting Force)         4 Crudivs, 2 desrons, 
   3 Third Fleet      (Blockade & Transport    Small craft.
   4. Fourth Fleet    (Mandate Defense Force)  1 Desron, 1 Subron and
                                                 many small units
   5. Fifth Fleet             ?                         ?
   6. Sixth Fleet     (Submarine Fleet)        6 Subrons
   7. Carrier Fleet   (Aircraft Carriers)      5 Cardivs
   8. Combined Air    (Seaplane tenders, etc.) 4 Airrons, & shore based 
      Force                                       planes

II. Japanese Naval Forces (Staff Headquarters)  1 PG and 3 DD s
      in China.
   1. First China Exped.  (Central China)       Gunboats
   2. Second China        (South China)         1 CA, 1 CL and small
         Exped. Fleet.                            craft.
   3. Third China         (North China)         Torpedo Boats, etc.
       Exped. Fleet. 
   4. Southern Exped.     (Saigon)              1 CL, transports and
         Fleet.                                    mine craft.

[117] The Japanese Navy now includes more vessels in active service
than ever before. More merchant ships have been taken over by the Navy, 
and the line between merchant ship and naval auxiliary grows fainter all 
the time. The base forces and guard divisions in the Mandated Islands 
have also greatly increased the strength of the Navy, which is on full-
war-time footing.


                  YAMAMOTO Isoroku, CinC (Admiral)
                         NAGATO, Flagship

                           FIRST FLEET

Batdiv One                               Desron One (Cont’d)
  NAGATO (F)                               Desdiv 27
  MUTSU                                      SHIRATSUYU (F)
  YAMASHIRO                                  ARIAKE
Batdiv Two                                   YUGURE
  FUSO (F)                                   SHIGURE
  ISE                                    Desron Three
  HYUGA                                      SENDAI (F)
Batdiv Three                               Desdiv 11
  HIYEI (F)                                  FUBUKI (F)
  KONGO                                      SHIRAYUKI
  KIRISHIMA                                  HATSUYUKI
  *HARUNA                                  Desdiv 12
Crudiv Six                                   SHIRAKUMO (F)
  KAKO (F)                                   SHINONOME
  FURUTAKA                                   USUGOMO
  AOBA                                       MURAKUMO
  KINUGASA                                 Desdiv 19
Desron One                                   ISONAMI (F)
    ABUKUMA (F)                              SHIKINAMI
  Desdiv 6                                   AYANAMI
    IKAZUCHI (F)                             URANAMI
    INAZUMA                                Desdiv 20
    SAZANAMI                                 AMAGIRI (F)
    HIBIKI                                   ASAGIRI
  Desdiv 21                                  YUGIRI
    NENOHI (F)                               ASAGIRI
    HATSUHARU                   Total: 10 BB, 4 CA, 2 CL, 27 DD.

*Note: The HARUNA has been inactive during 1941, and is probably 
undergoing major repairs.

Page 55

[118]                        COMBINED FLEET

                              SECOND FLEET

                             TAKAO, Flagship

Crudiv Four                              Desron Two (Cont’d)
  TAKAO (F)                                Desdiv 16
  ATAGO                                      HATSUKAZE
  CHOKAI                                     YUKIKAZE
  MAYA                                       AMATSUKAZE
Crudiv Five*                                 TOKITSUKAZE:
  MYOKO (F)                                Desdiv 18
  NACHI                                      KASUMI
  HAGURO                                     ARARE
Crudiv Seven                                 KAGERO
  KUMANO (F)                                 SHIRANUHI
  MOGAMI                                 Desron Four
  MIKUMA                                     NAKA (F)
  SUZUYA                                   Desdiv 2
Crudiv Eight                                 YUDACHI (F)
  TONE (F)                                   MURASAME
  CHIKUMA                                    HARUSAME
Desron Two                                   SAMIDARE
    JINTSU (F)                             Desdiv 9
  Desdiv 8                                   ASAGUMO
    ASASHIO (F)                              YAMAGUMO
    ARASHIO                                  MINEGUMO
    OSHIO                                    NATSUGUMO
    MICHISHIO                              Desdiv 24
  Desdiv 15                                  KAWAKAZE (F)
    KUROSHIO                                 YAMAKAZE
    OYASHIO                                  SUZUKAZE
    NATSUSHIO                                UMIKAZE
    HAYASHIO                      Total: 13 CA, 2 CL, 28 DD.

*Note: There is a possibility that a new cruiser has been added to  
Crudiv 6.

[119]                         THIRD FLEET

                      TAKAHASHI Ibo-Vice Admiral

                             NAGARA, Flagship

  CHOGEI (F)                             Desron Five
    Subdiv ........                        Desdiv 34
           ........                          HAKAZE
           ........                          AKIKAZE
           ........                          YUKAZE
    Subdiv ........                          TACHIKAZE
           ........                    1st BASE FORCE
           ........                      ........ Maru (F)
           ........                    Minelayer Division
2nd BLOCKADE FORCE                       ITSUKUSHIMA
  Desron Five                            AOTAKA
      NATORI (F)                         HATSUTAKA
    Desdiv 5                           Mine Sweeper Division 1 and 21
      ASAKAZE                            AM-1   AM-7
      HARUKAZE                           AM-2   AM-8
      MATSUKAZE                          AM-3   AM-9
      HATAKAZE                           AM-4   AM-10
    Desdiv 12                            AM-5   AM-11
      SATSUKI                            AM-6   AM-12
      FUMITSUKI                        Gunboat Division 1
      MINATSUKI                          6 Gunboats (Converted Fishing
      NAGATSUKI                              Vessels) 

Page 56

                         THIRD FLEET-continued

2nd BLOCKADE FORCE-Con.               2nd BASE FORCE
  SUBCHASER SQUADRON                    ......... Maru, (F)
    .......... (F)                      Minelayer Division 17
    Subchaser Division 1 and 11           SHIRTAKA
      PC-1 PC-7                           YAEYAMA
      PC-2 PC-8                           KUNAJIRI
      PC-3 PC-9                      At least 5 other men of war, and 17
    Subchaser Division 21 and 31       merchant ships.
      PC-4 PC-10                   Total: 1 CL, 12 DD, 1 AS, 6 SS, 6 CM,
      PC-5 PC-11                          12 AM, 6 XPG  12 PC, 46, AP.
      PC-6 PC-12
    27 AP-Names Unknown

[120]                         FOURTH FLEET

                           Hirata-Vice Admiral

                            KASHIMA, Flagship

Crudiv Eighteen                       FOURTH DEFENSE FORCE (HQ-
  TENRYU (F)                            TRUK
  TATSUTA                               Miscellaneous Forces Ashore, in-
  KASHIMA                               cluding Air Group #17 and
Desron Six                              Ponape Detachment of 4th Def.
    YUBARI (F)                          Force, Kusaie Detachment of 4th
  Desdiv 29                             Def. Force, Olol Detachment of
    OITE                                4th Def. Force, Greenwich De-
    HAYATE                              tachment 4th Def. Force, Mort-
    ASANAGI                             lock Detachment 4th Def. Force,
    YUNAGI                              Pingelap Detachment 4th Def.
  Desdiv 36                             Force, Puluwat Detachment 4th
    MUTSUKI (F)                         Def. Force, Lamortek Detach-
    KISARAGI                            ment ...... (Hall ?) of 4th Def.
    YAYOI                               force.
    MOCHITSUKI                        5th BASE FORCE
Subron Seven                            Saipan, Headquarters
  JINGEI                                SHOEI MARU (F)
  Subdiv 26                               Guard Division 5
    RO-60                                   Composition unknown
    RO-61                                 Minelayer Division 19
    RO-62                                   OKINOSHIMA (F)
  Subdiv 27                                  TOKIWA
    RO-65                                 Subchaser Division 56
    RO-66                                   KASHI (F)
    RO-67                                   XPG 561 (?)
  Subdiv 33                                 XPG 562 (?)
    RO-63                                   XPG 563 (?)
    RO-64                                 Gunboat Division 8
    RO-68                                   Composition unknown
  Subdiv-----                           9 AP or AK
    .........                         FIFTH DEFENSE FORCE (HQ-SAI-
    .........                               PAN)
    .........                           Miscellaneous Forces Ashore, in-
    8 XPG                                 cluding Air Group #18.
    4th BASE FORCE                    Tenian Detachment, 5th Defense
      Truk, Headquarters                Force
      ........ Maru (F)               PAGAN Detachment, 5th Defense
Guard Division 4                        Force
      ........ Maru (F)               Survey and Patrol Division
      ........                          KOSHU
      ........                          KATSURIKI (CM)
  4 AP or AK                            KOMABASHI (AS)

Page 57

                          FOURTH FLEET-Continued

FIFTH DEFENSE FORCE Con.              6th BASE FORCE-Continued
  Repair and Salvage Division           Minesweeper Division 16
    MATSUEI MARU                          NAGATA MARU (F)
    NAGAURA (MARU)                        CHOKAI MARU
3rd BASE FORCE                            DAIDO MARU
  Palao, Headquarters                     IKUTA MARU
  .......... Maru (F)                     ?
  Guard Division 3                                    |- (This may
  .......... Maru                        .......      |  be the
  ..........                             ....... Maru |  SALVAGE
  ..........                             ....... Maru |  Unit known
  ..........                             ....... Maru |  to be in
  ..........                                          |  6th Base
  Subdiv 6                                            |- Force)
    RO-56                               Subchaser Division 5
    RO-57                                 PC-51
    RO-58                                 PC-52
    RO-59                                 PC-53
  Subchaser Division 55               SIXTH DEFENSE FORCE  (HQ-
    .......... Maru (F)                   JALUIT)
    XPG 551 (?)                         KAIKEI Maru
    XPG 552 (?)                         #5 FUKU Maru
    XPG 553 (?)                         ....... Maru
    XPG 554 (?)                         Miscellaneous Forces ashore in-
THIRD DEFENSE FORCE (HQ                 cluding AIR GROUP #19 at
    PALOA)                              IMIEJI, Jaluit Atoll and prob-
  Miscellaneous Forces Ashore, in-      able Air Groups at WOTJE and
  cluding Air Group #16 and TOBI        KWAJALEIN and RUOTTO Is.
  detachment of 4th Defense Force       (Kwajalein Atoll) Detach-
  ..... Detach. 4th Def. Force          ment 6th Defense Force KWA-
  ......  "      "   "     "            JALEIN Is. (Kwajalein Atoll),
  ......  "      "   "     "            TAROA Is. (Maloelap Atoll ),
  ......  "      "   "     "            ENIWETOK Is. (Eniwetok
  ......  "      "   "     "            Atoll), UJELANG Atoll, ENY-
  Estimate these unknown loca-          BOR Is. (Jaluit Atoll), IMIEJI
  tions to be SOROI, HELEN              Is. (Jaluit Atoll), WOTJE
  REEF, ULITHI, YAP and AN-             Atoll-Detach. of 6th Def. Force,
  GUAR).                                UTIRIK Atoll-Detach. of 6th
6th BASE FORCE                          Def. Force.
 Jaluit, Headquarters              Total: 4 CL, 9 DD, 2 AS, 16 SS 1 Sur-
 TAKUHAN MARU (F)                  vey Ship, 3 CM, 15 XPG, 3 PC, 4 XAM
                                   41 AP or AK.

[122]                          FIFTH FLEET


The composition of a new Fifth Fleet is still unknown.
The Flagship has been reported at Maizuru.

                                SIXTH FLEET

                              (Submarine Fleet)

                               KATORI, Flagship

Subron One                              Subron Two
  TAIGEI (F)                              KITAGANI (F)
    Subdiv I                                Subdiv 7
      I-9                                     I-1
      I-15                                    I-2
      I-16                                    I-3
      I-17                                    I-7
    Subdiv 2                                Subdiv 8
      I-18                                    I-4
      I-19                                    I-5
      I-20                                    I-6

Page 58

                              FIFTH FLEET-Continued

Subron Three               Subron Six
  NAGOYA MARU (F)           KINU (F)
    Subdiv 1                 Subdiv 9
      I-74                     I-123
      I-75                     I-124
    Subdiv 12                Subdiv 13
      I-8                      I-121
      I-63                     I-122
      I-69                 Subron Ten
      I-70                     KARASAKI (F)*
    Subdiv 20                Subdiv 18
      I-71                     I-53
      I-72                     I-54
      I-73                     I-55
Subron Five                  Subdiv 19
  YURA (F)                     I-56
    Subdiv 28                  I-57
      I-59                     I-58
      I-60                   Subdiv 21
    Subdiv 29                  RO-33
      I-61 (Sank 10-2-41)      RO-34
      I-62                 Total: 3 CL, 2 AS, 1 AP, 42 SS.
    Subdiv 30

*Note: The old sub-tender KARASAKI appears to have been recommissioned.

[123]                CARRIER FLEET (Cardivs)

                         CV KAGA Flagship

Cardiv 1                              Cardiv 4
  AKAGI                                 ZUIKAKU
  KAGA (F)                              SHOKANU
    Desdiv 7                              Desdiv 3
      OBORO (F)                             HOKAZE
      USHIO                                 SHIOKAZE
      AKEBONO                               NAMIKAZE
      AKATSURI                              NUMAKAZE
Cardiv 2                              Cardiv ......
  SORYU (F)                             CV KORYU
  HIRYU                                 CV KASUGA (MARU)
    Desdiv 23                      Total: 10 CV, 16 DD.
Cardiv -
    Desdiv 17

[124]                    COMBINED AIR FORCE

                   Kanoya Naval Air Station, Hdqtrs.

Shore-based land planes and seaplanes. The organization provides for 
great mobility. Air units are ordered to work with other forces, and 
return to the Combined Air Force pool when their mission is fulfilled. 
The named Air Groups (e. g. the Takao Air Group) are not tied down to 
their stations, but are sent freely wherever they are needed. 
Furthermore, the various air squadrons and air groups frequently split 
into smaller units, and are scattered over wide areas.

Page 59

Because of this extreme mobility, the picture is constantly changing. 
Accordingly, the following list makes no attempt to indicate all the 
temporary groupings into which the various units may be combined.


Air Ron 6                                8th Air Group
  KAMIKAWA MARU (F)                     10th Air Group
  FUJIKAWA MARU                         11th Air Group
  KENJO MARU                            12th Air Group
  (Has been working with the 3rd        14th Air Group
    Fleet)                              16th Air Group
Air Ron 7                               17th Air Group
  CHITOSE (F)                           18th Air Group
  CHIYODA                               19th Air Group
  MIZUHO                                23rd Air Group
  (Has been working with the. 1st       Chichijima
    Fleet)                              Chinkai
Air Ron 24                              Genzan
  KAMOI (F)                             Hyakurihara (or Moribara)
  1 XAV                                 Iwakuni
  Yokohama Air Group                    Kanoya (Hdqtrs.)
  Chitose Air Group                     Kashima
  (Has been working with the 4th        Kasumigaura        Sasebo
    Fleet)                              Kisarazu           Suzuka
Patrol Squadron 2                       Kure               Takao
  NOTORO                                Maizuru            Tateyama
  (Formerly with Air Ron 6)             Oita               Tsukuba
                                        Ominato            Usa
                                        Omura              Yatabe
                                        Saeki              Yokosuka
 TOTAL: 5 AV, 3 XAV, 35 Air Groups.

[125]                    TRAIN FOR COMBINED FLEET

SHIRETOKO                 ONDO                  AKASHI
SATA                      HAYATOMO              MUROTO
TSURUMI                   NARUTO                OTOMARU
SHIRTYA                   MAMIYA                SETTSU
IRO                       ASAHI

Total: 8 AC, 1 AF, 2 AR, 1 AC, 1 Ice Breaker, 1 Target Ship.

[126]                 JAPANESE NAVAL FORCES IN CHINA

                        KOGA, Mineichi-Vice Admiral

                              IZUMO, Flagship

  SHANGHAI BASE FORCE                 Patrol Division 11-Continued
   ASUGA        KURI                    HIRA
   TSUGA        HASU                    TOBA
Shanghai Harbor Affairs Section         ATAMI
Special Naval Landing Force, Shanghai   FUTAMI
Nanking Base Force                      FUSHIMI
Special Naval Landing Force, Nanking    SUMIDA
    EXPEDITIONARY FLEET               Hankow Base Force
                                      Kiukiang Base Force
KOMATSU, Teruhisa-Vice Admiral        Gunboat Division ? ?
UJI, Flagship                           SHINFUKU MARU (F)
Patrol Division 11                      HITONOSE
  ATAKA                                 CHIKUBU
  SETA                            Total: 4 PG, 10 PR, 1 AP.

Page 60


                                        SUGIYAWA, Rokozo, Vice Admiral
NIIMI, Wasaichi, Vice Admiral                IWATE, Flagship
ISUZU, Flagship                        Patrol Division 12
Crudiv 15                                IWATE (F)
  ISUZU (F)                              MANRI MARU
  ASHIGARA                             Torpedo Boat Division 11
Patrol Division 14                       HATO
  SAGA                                   SAGI
  AM-l7                                  KARI
  AM-18                                  KIJI
Torpedo Boat Division 1                Torpedo Boat Division 21
  OTORI                                  CHIDORI
  HAYASUSA                               MANAZURI
  HIYOBORI                               TOMOZURU
  KASASAGI                               HATSUKARI
Guard Division 15                        KARUKAYA
Guard Division 16                      Gunboat Division 1
Canton Base Force                      Gunboat Division 2
Amoy Base Force                        Gunboat Division 13
Hainan Is. Base Force                  Gunboat Division 14
13 Special Service Ships               Tsingtao Base Force
13 Misc.                                 KASHII (F) (CL)
                                         SHIMBUSHU (CM)
                                        Total: 1 OCA, 1 DD, 8 TB, 1 AP.


1. FOURTH FLEET, which may be termed the MANDATE FLEET, apparently 
administers, the Naval activities, afloat and ashore and also the Army 
Garrisons units in the Mandated Islands. While the forces afloat 
exercise administrative jurisdiction over the Mandate area, the Yokosuka 
Naval District is directly responsible for the supply of stores, 
material and provisions. Truk is the headquarters for supply and 
munitions and has been principle Fourth Fleet operating base.

2. Up to the present the entire Mandated Islands have been lightly 
garrisoned, the majority of the garrison units being Naval Defense 
Forces ("special Landing Forces" corresponding to our Marine Corps) but 
some Army troops are believed to be on SAIPAN, PALAO, PONAPE, TRUK and 
JALUIT. The total garrison force has been estimated at fifteen thousand. 
In addition, there are Civil Engineering Units engaged in development 
work on various islands. Working in conjunction with these are naval 
engineering units, naval ordnance specialists, navy yard units with 
civilian navy yard workers and technicians. The network of naval radio 
stations has been greatly expanded, meteorological stations and high 
frequency direction finders installed at strategic locations, aviation 
facilities increased both in scope and number, and shore-batteries 
emplaced on strategic islands of key Atolls.

3. It is apparent that a decision to expedite the fortification, 
expansion of facilities and militarization of the Mandated Islands, was 
made late in 1940, probably concurrently with the signing of the 
Tripartite Pact. The movement of naval auxiliaries, small and medium 
cargo, freight-passenger vessels (ex-merchant marine) to the Mandates 
began in December, 1940, and has increased in scope and number until 
some seventy odd vessels are engaged in this traffic, the average number 
present in the Mandate area at any one time being some forty odd 

4. The function of supply of munitions, supplies, material and 
provisions to the Mandates is under the YOKOSUKA Naval District with a 
Headquarters for Civil Engineering, Munitions, Military Stores and 
Supplies for the Mandates centered at Truk, although this function is 
normally under the jurisdiction of Yokosuka as the Mandates are in the 
First (HQ-YOKOSUKA) Naval District.

5. The Commanders of the 3rd, 4th, 5th, and 6th Base Forces are 
subordinate commanders under Commander-in-Chief, 4th Fleet; they have a 
designated Flag-

Page 61

ship and a Headquarters or Administrative Section, the latter remaining 
ashore at the home base regardless of the movements of the command or 
the Flagship. Each Base Force contains a DEFENSE FORCE, detachments of 
which are stationed on outlying islands of that general area. Four Ro 
Class submarines have been reported to be attached to the PALAO BASE 


6. Considerable air activity has been in evidence in the SAIPAN PALAO-
PELELIU, TRUK, PONAPE and JALUIT-KWAJALEIN areas. Close cooperation has 
been noted between the Defense Forces and the Aircraft activities at 
their home bases. Foreign steamers nearing the SAIPAN area have been 
subject to aircraft observation and close scrutiny by Patrol planes, 
Bombers and fighters. Heavy land plane bombers and Patrol planes, 
undoubtedly ORANGE, have made reconnaissance flights over the Gilbert 

7. The distribution of material, personnel, and installations in the 
Mandated Islands is indicated in table "A". While this is admittedly 
incomplete and may be subject to inaccuracies, it represents the latest 
and best intelligence on this subject. In addition to those listed in 
Table A, there are a number of potential bases, principally in the 
lagoons of the naturally protected atolls, which may be used as 
emergency bases or may be earmarked for "priority two" development.

8. The latest information (up to 25 November 1941) indicates that the 
present distribution of the Air forces (believed to be a temporary 
strategical disposition other than a permanent assignment) in the 
Mandates is:

Identification               Location             Includes
Airron 24                    Marshall Area        (AV) KAMOI
                                                  (AV) ...... Maru
                                                  ex-CHITOSE Air Group
                                                  ex-YOKOHAMA Air Group
11th Air Group               PALAO Area
16th Air Group               PALAO Area
17th Air Group               TRUK
18th Air Group               SAIPAN
19th Air Group               IMIEJI Is. (Jaluit
Air Station (and Air Group?) WOTJE
Air Station (and Air Group?) KWAJALEIN
 ?   AIR GROUP               TRUK

The exact composition of these Air Groups is unknown and the estimates 
of total plane strength in the Mandates vary widely: 62-268 planes.

        Last Page of Intelligence Bulletin No. 45-41.

(Pages 130, 131 132, and 133 of Exhibit B consist of Table A showing the 
distribution of Japanese material and personnel forces in the Mandates, 
a sketch of Palao, and a sketch of Malakal Harbor. These pages will be 
found reproduced as Items Nos. 2, 3, 4, and 5) EXHIBITS-ILLUSTRATIONS, 
Clausen Investigation. These illustrations will be found bound together 
following the printed exhibits of the Clausen investigation.)


1. Aviation facilities.-Two landing fields, each with a hangar capable 
of using twenty medium sized planes. Engineering Shop (camouflaged) 
situated between the two fields. Adjacent storehouses (galv. iron) 
camouflaged. Diesel fuel and gasoline storage in camouflaged, above-
ground tanks adjacent to air fields. Diesel power plant (June 1940). 
Eighty planes reported based here (November, 1940).

On beach opposite southern air field is Naval Air Station having small 
ramp and one hangar for seaplanes (June 1940). This may be an auxiliary 
as present indications point to naval air Base on IMIEJI (EMIDJ) Is.

2. Headquarters-Two story concrete building. Large building to SE of 
headquarters is Post Office and Telephone central. Flagstaff adjacent to 
Post Office is also used as signal tower. In town are many one story 
concrete stores. Good bituman and powdered coral roads.

Page 62

3. Radio towers.-Two steel combination radio and lookout towers 400 feet 
high. Diesel engine power plant near southern tower (1940).

4. Shore Batteries-Bases and trunnions along the three quarter mile 
water-front street called the Marine Parade (1940) (guns not mounted in 
June, 1940 but are now). Also three 6" guns and a battery of four 4.7" 
field pieces. Barracks for regular garrison of 500 soldiers (1940) 
(probably enlarged now).

Mobile Batteries-Machine guns and AA guns mounted on Diesel-tractor 
towed trailers. 10 searchlights on pneumatic tired truck assemblies 

5. Government Pier-600 feet long, 75 feet wide (18’-25’ alongside) 
equipped with two railroad tracks and three 10 ton mobile cranes. 
Storehouse on end of pier (1940).

6. Mole-150’ concrete mole constructed parallel to shore line along NW. 
corner of JABOR (1933).

7. Conspicuous red building (may be red-roofed building) (1936).

8. South Seas Trading Co. PIER (N. B. R. or "NAMBO") also called "SYDNEY 
Pier". Two water tanks and warehouses. Coal and briquette storage 

9. Two buildings (resembling hangars) with tracks leading down to water 
from one of them (beaching gear?-small marine railway?). A gasoline 
storage located near the two buildings. (1936.)

(Page 135 of Exhibit B is a sketch of Jaluit Harbor which will be found 
reproduced as Item No. 6, EXHIBITS-ILLUSTRATIONS, Clausen Investigation. 
These illustrations will be found bound together following the printed 
exhibits of the Clausen investigation.)

Page maintained by Larry W. Jewell, Created: 12/13/96 Updated: 12/19/96